Melody Doctor of TCMNov 16, 20191 min如何減少疫苗後疼痛如何減少疫苗後脹痛 世衛講,肌注時不回抽,會減少針頭在肌肉內移動。(從而減少疼痛。) No aspiration should be done during intramuscu- lar injections, as this may increase pain due...